Method of constructing pneumatic tires



F. s. lKlNsoN AND1. SPRINGER. METHOD 0F CONSTRUCTING PNEUMATC TIRES.

APPLICATION FILED AUG-1631915. RENEWED MAE. 13.1921. 1,394,069.

F. S. DCKNSN AND1. SPRINGER. Memor) of coNsT'RucHNG PNEUMATIC DRES. PMJCTION FILEU UG-l6y |915 RENEWED MAR. 18| 192]- L3945069.

Patented oct. 18, 1921.

2 SHEETS-SHEET 2.

(Jnucffol TM' f To all 'whom if.' 71mg/ concern.

"narran STATESl PATENT' OFFICE.

FREDRCK S. DICKINSON, OF NEW YORK, N. lY., AND JOHN SPRINGER, OF BRADLEY BEACH, NEW JERSEY, ASSIGNORS TO SAID DICKIN SON.

METHOD 0F CONSTRUCTING PNEUMATIC TIRES.

Leganes.

Patented Oct. 18, 1921. 115,138. Renewed March 18, 1921. Serial No. 453,476.

ployed in tires of the class to which our im'- provements relate.

In the drawings- Figure l is a perspective view, partly in section, illustrating a portion of a tire having two plies of cord laid according to our invention.

Fig. 2 is a detail trating the loop of iniorcing ring at the Fig. the core over which the cords Be it known that we, Fnnonioi; S. DroniNsoN, a. resident of New York, in the county and State of New York, and JonN SPRINGER, a resident ot Bradley Beach, in the county. et Monmouth and State ot' New Jersey, both citizens ofthe United States, have invented certain new and` useful Improvements in Methods of Constructing Pneumatic Tires, of which the following is a specification'.

This invention relates to methods of constructing pneumatic tires such as are non` commonly used upon automobiles and other vehicles and which comprise an elastic shoe or casing which constitutes the outer portion and tread of the tire and incloses the inner air tube and which has an internal body tabric or carcass formed hy cords or threads.

llnder the ordinary methods of constructing cord or thread-fabric tires of the type above set forth, except such methods as provide an individual anchorage means for each cord at the`bead-edge, it is usually impossible to lay and maintain the cords with the required initial tension applied during` the act of laying, and under circumstances where the required initial tension is accomplished in the laying of the Acords the lack of proper anchorage means results in a release oi' such tension during ess of vulcanizing the carcass. This results from the fact that during vulcanization the heat causes the caoutchouc or rubber, vwhichy terms the cohesive bond under' which the cords or threads were laid in building up the carcass. to ilow and thus destroy or impair the' etl'ect ot the cohesive hond, under which action the tension is released by slippage oi" the cords or threads in their tendency to assume their normal length.

Our present improved method of .coustructing cord or thread-fabric tires is de` signed to effectively overcome the disadvantages and diiiiculties above set forth and as heretofore. ekperienced inthe manufacture oi' tires of this type, and to provide a simple, etiicient and economical method of laying the cords or threads and securely maintaining the conditionsV of tension in which they are initially laid in building upthe body fabric or carcass. Our improved method is adaptable to cords of either flat or round cross-section and also teso-called thread-fabrics of the types variously emperspeetive view illusthe cord around arebead-edge.

are laid, illusto the friction-fabric strips and flange-rings for retaining the latter.

Fig. 4 1s a detail cross-section illustrating with relation to the friction-fabric.

lig. 5 is a detail cross-section corresponding to Fig. 4 and illustrating the linal position of the friction-fabric with relation to the bead-edge.

Fig. 6 isA a detail sectional View, on the plane of the annulus of the tire, illustrating the lay of the cord loops at the bead-edge without a reinforcing ring.

- Fig. 7 is a detail perspective View, partly in section and similar to Fig. l, of a port-ion of a tire, illustrating the' laying of two plies with round cords.

in section and similar to Fig. 7. illustrating the laying of individual cords 'of single lengths.'

Fig. 9 is a detail cross-section illustrating the insertion of a filler between the two plies oi" cords to enlarge the. size ot the bead.

y Fig.` l0 is a detail cross-sectionillustrating a modification in which the looped ends oi the cords are folded at the bead-edge in lieu of being laid Fig. ll is a det-ail'cross-section similar to Fig. l0 and ication in the method looped ends.- e A Fig. l2 is a detail cross-section. illustrating the `attachment of a bead-edge outside the laid cords to form a clencher tire construction.

Fig. 13 is a detail cross-sectionfillustrating the employment of a single reinforcingheadring for a plurality of p ies of cord.

Fig. 14 is a detail cross-sectional view similar' toV 3 and illustrating a modifiez tion in. the method of laying the cords of laying the folded 3 is a cross-sectional view through' the subsequent pr0c- F fg. 8 is a detail perspective view, .partly.

around a reinforcing ring.

illustrating a further modi-- trating the laying of the cords with relation i the lay of two plies of cords at the bead-edge whereby the tension thereof may be increased over the tensional condition under which they are initially laid. -Y

Fig. 15 is a detail cross-sectional View similar to Fig. B and illustrating a modification in the method of layinpy the frictionfabric strips in their operative relation to the cords. I

Corresponding parts in all the figures are denoted by the same reference characters.

`Referring 'to the drawings, l designates a core or mandi-il over which the cords or threads, 2, are laid, said core being annular and having a cross-sectional contour corresponding to the segmental cross-sectional contour of the tire body fabric or carcass. ln carrying out our improved method, any suitable or adapted mechanism or mechanical means may be employed, other than that herein shown, but the preferred means comprise flange-rings, 3-3, which are suitably mounted in parallel position with `their respective peripheries bearing with relation to the'circumiference of the annular core 1 at the inner side thereof and adjacent to the point at which the bead-edge of the tire is to be formed, the' periphery of said rings being conca-ve, as at 4C, to correspond to the segmental curvature of the face of the core. These rings are suitably mounted so that they are retained in their bearing relation to the core during` the operation of laying the cords, but are removable from their position with relation to the core after the cords are laid, for which purpose the rings may be formed of an assemblage 'of segmental sections as will be readily understood. -The relative position of the core and flange-rings is such that the rings arelrespectively at opposite sides of the inner side of the core adjacent the terminal bead-edge of the tire fabric, als shown in Fig'. 3.

ln the method of constrruftinpthe cord or threadbody fabric, as comprised in our present invention, a strip of friction-fabric, 5, is laid against the' inner side of the core 1 and is held in position, With'its outer side edges, G-(l, extending a short distance beyond the point of the toe of the bead-edge of the cord or thread fabric, bythe respective flangerings 3-3, the outer-edges of which are at the point of the bead-toe, as shown in Fig. 3. This frictionfabric may be of any suitable character having the requisite adhesive quality, and `(ve preferably employ the fabric which is commonly known in this art and which is frictioned by the application of caoutchouc or other compounds. Vile may employ a continuous strip of friction-fabric extending from side to side as shown in Fig. 3, which strip is adapted to be cut centrally at a point intermediate of the flange-rings SP3, by means of a suitable cutting element (shown at 7, Fig. 3), to divide it into twov respective strips for folding over the beadedge formation ofthe cord or thread fabric after the latter is laid; or t-Wo separate strips of friction-fabric may be initially employed, the respective strips being positioned with relation to the core 1 and flange-rines 3 is shown in the Inodication illustrated in Tig. l5, each strip bein of sufficient Width to permit of its folding over the bead-edge formation, whereby the cutting or separation of a continuous strip as shown in Fig. 3 is obviated.

llVhen flat cords are employed, in constructing the body fabric o carcass according to our method, the cords, 8, are laid over the core 1, preferably in a position diagonally or at an angle to the transverse plane ofthe tire (as shown in Fig. i), and under the desired tension, with their laid portions at the bead-edge in contact, as at 9, with the friction-fabric strip 5, the cords being pressed to this contact to create an adhesive bond with the friction-fabric ati-he edpje portion thereof which projects beyond the flange-ring 3 and from the toe of the bead. From this adhesive bond 9, the cord is carried down at the side of the angering, and turned to produce a loop,"l0, which is formed by laying the flat cord over itself .(see Fig. 2) so that the portions ofthe cord at the loop lay parallel and each succeedingy strand in the lay of the cord overlies the preceding strand and said strands relatively diverge in their overlapping or overlying position from the loop at the bead-edite in a continuous and gradpal radial spreal: as'at 11 (see Fig. 1), to' lthe tread portion of the tire. This gradual divergent or radial positional lay of the overlying strands of cord produces a body fabric in which the cords spread over and entirely cover the increasing;l progressive variable circumference of the tire between the bead and tread and thus .completely cover the full area thereof with one lay or ply of the cords. The divergent positional lay ol the overlying cords from the bead-edge, as just referred to and for the purpose stated, is similar to that covered by' the method of laying` cord fabric tires as set forth in the co-pending application of l?. S. Dickinson Serial No. 10.667 and is not hercin specifically claimed. y

lt will be understood that in forming the loops 10 the flange-ring 3 prevents cohesion between the loop of the cord and the friction-fabric 5 beyond the bead-toe, as shown in Fig. 8, and provides a templet to build to in the laying of the cord fabric and the formation of the loops. When the cord is laid and loopedl inY the manner above described, the looped ends which extend at the side of the flange-ring are folded back from the bead-toe, as at12, and laid against and in contact with the outer face of the end portions of the cords which are in contact with the friction-fabric strip 5, as shown in Figs.

soA

1 and 6.. The fold is at thel extreme inner edge of the bead and the folded looped ends are preferably laid diagonally or obliquely with relation to the cross-sectional plane of the tire in a position approximately at right angles to. the diagonally-laid main portion of the cords which are in contact with the friction-fabric, and the folded ends thus laid are preferably positioned so that their folds manner above described to produce the bodyl fabric or carcass, but it will be understood that separate strands of cord may be employed for the laying of the fabric, or that each strand passing from side to side may.

be a separate length of cord as will be hereinafter more fully described.

'Under the positional conditions of the laid 'cords and looped ends as above Set forth, thereis frictional contact between each loop and between each loop and a series of Astrands of cord underlying the same, each loop diagonally crossing said series of strands, winch. conditions of multiple fric- Ational contact serve to effectively prevent release of the tension under which the cords are laid, In thisvconnection, it will be understood that the cords are preferably initially frictioned before laying by the application of caoutchouc or other suitable compound', or that the`cords may be impregnated and coated as well with a friction compound. 1n addition to the frictional contact whit-h prevents release of tension, the friction-fabric strips 5 effectually retain the initial tension under which the cords are laid before the formation and layingof the end loops 10, and furthermore the clamping action of the mold and core overthe bead portion of the laid cords, when the laying is completed and the carcass is placedin the mold for vulcanization, operates against any slippage or release of the tension under which the cords'are, laid.

Th fold l2, beyond which the loop l() is formed. is preferably made under and around a reinforcing ring, 1/1, at the beadedge, which ring is an annular member or hoop of metallic wire or a plurality of wires or cable, 'or it may be of textile material or a combination of textile strands and wire combined with a caoutchouc filler. The operative relation of the reiiiiforcingring` inserted within the cord fabric as just .described, is such that thebead is rendered inextensible and thus etfectually precludes the forcing of the bead over the wheel rim edges when the tire is in srif'ice or use. But in the instance of. tires, constructed according to the present invention, which 4are designed for use on rims of the non-detachable type,

thereinforcing rings are preferably of a character which will afford an elastic limit suiiicientto allow the bead to bc stretched over the rim edge. in which circumstances the edge of the tire will be effectively coustricted by inflation of theinner air tube and will thereby be held in permanent position with relation to the rim when in service or use.

Vhen a plurality of plies or layers of the improved cord fabric are employed, an individual reinforcing ring 14 may he positioned inl each ply` illustrated in Figs. 1, 4, o, and other of the multiple-'ply views; but under some circumstances of preferred construction a single reinforcing ring may be employed in and for a plurality of plies, as illustrated in Fig. 13, the folds or bends 12 of each superposed ply being all turned around the single ring in one operation after -the cords are laid in the manner hei-einliefore described.

In the employment of a plurality of plies or layers, after the laying of the first ply. the succeeding ply is then laid in super-posed postion thereon, and preferably at a reverse diagonal or oblique `angle with relation to the under ply, as shown in Figs. 1 and T. in Fig. 6, we have illustrated a modified fonstruction, in which the cords are laid. according to our improved method and as shown in Fig. 1. without the insertion or employment of the reinforcing rings 14.

lilhen t-he laying of the. cord fabric is completed as above described. the frictionfabric strip is released by the removal or withdrawal of the flange-rings 3 from their bearing relation to the core 1. and if a single strip is employed as shown in Fig. 3 it is then cut centrally intcrmediately between the flange-rings to divide it into two respective strips, whereas if the separate strips 'are initially employed as shown in Fig. l5

no cutting'or division is necessary. The poi tion of the friction-fabric strip which is then free from its adhesive bond with the laid cords is folded outwardly-under the bead edge of the cords, as illustrated in Fig. el, and upwardly against the outer side of said bead-edge portion, as illustrated in Fig. 5, which folding ofthe friction-fabric strip over and around the bead formation and inI adhesive Contact therewith provides a further supplementary binder for the-cords at the bead edge and serres as a covering and reinforcement therefor. Y

In the laying of tire fabrics, according to our invention, with round cords or cords or threads of'cylindrical cross-section, the cords are laid in substantially the same manner as hereinbofore described with reference to the employment of flatcords and. as illustrated in Fig. 1, but the strands. of the round cords :fre laid close together side by side at the 'bead edge (instead of overlying each other',

round cords are folded so that they respec-.

tively overlie each other and contact with the next adjoining fold at an angle to the annulus of the tirer` as shown in Fig. .7. in substantially the same manner as the loops ol the fiat cords as shovvn'in Fig. l. ln the medification illustrated in Fig. T. we have shown two plies of laid round cords, the plies being relatively positioned in reverse diagonal or oblique directions in the saine manner as before set forth.

In Fig4 8. we have illustrated a modifieL tion in which the cords. in lieu of being laid from a continuous length, are laid from single lengths constituting each strand. In these circumstances, the single lengths of cord are not looped at the beadfedge but the 'terminal ends, lo, of the strands are folded and brought up t0 the same posit-ion as that occupied by the loops heretofore described. This method of laying with single' lengths or strands is also especially adapted for the laying of tire fabrics according to our method with the so-called tln'ead-fabricsi llnder circumstaiucs in which it is desired to enlarge the size of the bead, the r spective. layers. of cords may be separated at the bead-edge to leave an intervening space in which is placed a filler, as at 17, of rubber or other suitable caoutchouc compound, to form the central portion of the bead and -spread or enlarge the size of the same, as

shown in Fig. S).

ln Fig. l0. we have illustrated a modifi-- cation in the method of laying the cords at the head-edge, in which the looped ends 1l).

in lieu of being 'folded baclfrom the bead.

toe and laid against the cord strands (as illustrated in Figs. l, T. and other views), are turned from the fold or bend so that they lie at right angles to the main strands of cord and within the bead at the base thereof, as at 18. (lne special construction as adapted to this method is illustrated in Fig. l()` in which a two-ply fabric is employed with thc respective plies separated to form the intervening space at the b ad within which is placed thc filler l? to spread or cnlarge the bead, and having the looped ends of the respective plies turned inwardly in opposite directions at the base of thc bead beneath the filler.

A modification in the construction according to the modified method as above set forth and shown in Fig. 10 is illustrated in Fig. 11, in which the i not separated at the bead but are laid continuously in superposed position to the beadtoe, and the looped ends l() of the respective plies are turned downwardly at right angles to the main strands of the cord fabric and are laid in superposed position at the base of the bead beneath the enlarging or spreading filler 1T, as shown at 19. (Fig. ll.)

In both the constructions according to the 'modified method of laying the looped ends as shown'in Figs. 10 and l1, the tension of the laid cords is effectively maintained under the' initial condition in which they arelaid, as the folded looped ends are clamped in position within the mold.

ln F 12, we have illustrated a construction especially adapted for clencher rims, as produced according to our improved method. ln one type of such construction as herein shown the two plies of cord are laid in substantially the same manner as hereinbefore described and as shown in Figs. 1 and 7, and a suitable filler of caoutchouc or other rubber compound is placed outside the looped ends of the cords at the bead-edge and is covered and inclosed by the friction-fabricstrip This filler, as at 20, 1s of suitable contour to form a bead adapted for clencher rims and also affords the requisite elasticity' to enable the placement of the tire-bead over the rim edge.

In producing tire fabrics according to our present improved method. we provide also for increasing the tension on the cords or threads over the degree of tension in which they are initially laid, which increase and equalizing of the initial tension is desirable under some conditions, trated in Fig. 14: means whereby this may be accomplished in carrying out our method. ln the circumstances as just stated. the flange-rings 3 are of greater diameter in their relation to the core l than are the flange-rings as hereinbefore described and as shown in Fig. 3. The increased diameter is such that the flange-rings extend up on the sides of the core beyond he toe of the tire-bead. and the friction-fabric strip 5 is not laid between the periphery of the ring and the core but is laid at the outer side of the ring. and is held in place by a supplementary flange-ring, '21, suitably mounted and retained in position parallel to the outer side. of the flange-ring 2l and over the friction-fabric strip. The diameter of the supplementary ringL 21 corresponds to that of the beadtoe atk which point the cords or threads are folded back. at l2, as herein previously described. and the outer face of the ringat its periphery is preferably beveled toward the'periphery, as at. Q2. in laying the cord under these conditions. the length of the strands of cord required efr;-

and We have .illus-v respective plies are` f roo,

tend from the point of the fold 12 at one side of the core l to the corresponding point on the opposite side thereof is less than under the circumstances in whichv the bead is built up against the core according to the construction and means as heretofore set forth and illustrated inFig. 3, as the main Harige-ring 3 in the present instance extends to a higher point at the side of the core and 4 the bead is formed over the extended peripheral portion of the'lange-ring. Then, when the flange-rings have been removed from their position with relation to the core, the bead. -is forced inwardly against the core to the point, indicated at 23, which would be the position of the fold if the lesser-diameter Hange-ring as shown in Fig. 3 were employed, and this operation stretches orextends the cords or threads and thus increases and equalizes the tension beyond that under which they wer-e initially laid. In effecting the resultjust stated, the increased-diame ter main flange-ring 3 forms practically an extension of the side of the core 1 tocarry that portion of the friction-fabric, strip 5 ,against which the cords are pressed to create an adhesive bond and to maintain the tension under which the cords are initially laid over the core 1, which extension produced by the removable llangeiing increases the diameter of the core at the point where the cords or threads are folded back, at l2, and thus requires a lesser length in the strands of cord which extend between the folds 12 at the opposite sides of the core. It will therefore be understood that, when the flange-ring is removed and the laid cords are then brought inwardly after being bonded to the friction-fabric strip and thus secured in their initial tension, at the point of the fold l2 and against the core at the normal' point 23, the movement increases the reuired length of'the strand of cords between tie folds l2 at opposite sides of the core and therefore causes the stretching or increasing the length of the strands of cordsv which produces an increased tension' thereon supplementary to the tension in which they were initially laid and bonded to the friction-fabric strip, and this latter increased tension'is maintained in the further formation of the bead construction and the final application of the friction-fabric strip-and in the mold as hereinbefore set forth.

The practice of our improved method, and the advantages produced thereby, will be readily understood by those skilled in the art -to which our inventionA appertains. The' method enables the laying of the cord or threadsl rapidly and in a. simple and eficient manner, and the effective and convenient formation of the bead-edge construction in connection with the friction-fabric strip, and

ments.

maintained in the condition of tension under which they are laid by the cohesive bonds which are established by our improved method between the friction-fabric strip and between the laid cords.

lVe do not desire to be understood as limit ing ourselves to the detail features of the method of construction as herein illustrated and described, as it is manifest that variations therein may be resorted to in the adaptation of the method of construction to varyin'g conditions according to the type of pneumatic tire casing to which the cord body fabric as produced by our Inethod is to be applied, without depart-ing from the spirit and scope of'our invention and improve- VV'e therefore reserve the right to all such variations and modifications as4 properly fall within the scope of our in vention and the terms of the following claims. p

Having thus described our invention,4 we claim and desire to .secure by Letters Patent:

l. The method of constructing the intcryond the looped-edge port-ion, the cord being placed in its successive lay in contact with said friction-fabric strip and retained thereby in said position with the looped side edges of the cord fabric initially extending in free position beyond said strip.

.2. The method of constructing'the internal body fabric for the shoe or casing of pneumatic tires, which comprises laying a continuous length of cord or thread backend forth over a core or mandi-il to produce loops at the side edges of the cord fabric at the bead-edge portion, the continuous length of cord being turned upon itself to form said side-edge loops, and locating a. friction-tabric strip in retained position at a point under the length of cord and immediately beyond the looped-edge portion, the cord being placed in its successive lay in contact with said friction-fabric strip and retained there by in laid position with the looped side edges of the cord fabric initially extending in free position beyond said strip, and then turning said looped edges beyond said friction-fabric strip at an angle to the portion of the cord fabric which is 'secured to said strip.

3. The method of constructing the inter'- nal body fabric for the shoe or casing of pneumatic tires. which consists in laying a length of cord or thread over a core or mandril, and locating a friction-fabric strip 1n retained position under the length of cord and immediately beyond the edge thereof at the bead-edge portion, the cord being placed in its lay in contact with said 'friction-fabric strip and retained thereby in laid position with the bead-edge portion initially extending in free position beyond said strip`r `and said strip having a 'tree portion extending beyond its contact with the cord, then turning the bead-edge portion ot the length of cord beyond Said Airiction-fabric strip at an angle to the portion' which is secured to said strip, and then turning the free portion o't said friction-fabric strip around the turned edge portion ot' the cord and in contact there# with.

4. The method o'f constructing the internal body fabric Jfor the shoe on casing ot' pneumatic tires, which comprises laying a length ot' cord or thread over af core or inandril'. and locating 'a friction-fabric strip in retained position under the length of cord and immediately beyond the edge thereof at the bead-edge portion`r the cord beingplaced in its lay in contact with said friction-fabric strip and retained thereby in laid position with ,the bead-edge portion initially extend ing in free position beyond said strip, and thenitolding the free edge' portion of the length of cord beyond said 'friction-fabric strip outwardly and upwardly against the bead-edge portion of. the length of cord which is in contact with the friction-fabric strip.

kThe method of constructing the internal body fabric for the shoe or casing ot pneumatic. tires, which comprises laying cords or threads over a core or Inandril, and locating a friction-fabric strip in retained position at a point under the length ot cord and immediately-beyond the side edges thereo'f, the cord being placed in its lay in contact with said vtriction-fabric strip and retained thereby in laid position with its side edges extending in tree position beyond said strip`r and then Afolding the end portions of the cords or threads beyond said 'friction-fabric strip into a loop and lay-ing said looped ends at an angle to the port-ion which is secured to said strip.

6. The method of constructing the internal body fabric for the shoe or casing of pneumatic tires7 which comprises` laying cords or threads over a core or mandril, and locating a friction-fabric strip in retained position at a point under the length of cord and immediately beyond the side edges thereof, the cord being placed in its lay in contact with said friction fabric strip and retained thereby in laid position with its' side edges extending in t'ree position beyond said strip. and the cords being laid so that they relatively diverge in a continuousg adual and radial spread from the bead Yedge te the tread portion` and then turning the i ,salines ends of the cords or threads beyond said friction fabric strip at an angle to the por tion which is secured to said strip.

7. The method orf tonstrusting,- the internal body fabric Jjor the shoe or casing of pneumatic tires, which comprises layinfr cords or threads over a core or Inandril, and locating a rictiond'abric strip in retained position at a point under the length of cord and immediately beyond the side edges thereof, the cord being placed in its lay in contact with said friction-fabric strip and retained thereby in laid position with its side edges extending in free position beyond said strip, and the cords being laid so that each succeeding strand overlies the preceding strand and said strands relatively diverge in a continuous gradual and radial spread from the bead edge to the tread portion and entirely cover the increasing progressive variable circumference of the tire betweenthe bead and tread with one lay or ply of the cords. and then turning the ends of the cords or threads beyond said frictionfabric strip at an angle to the portion which is secured to said strip.

S. T he method of constructing the internal body fabric for the shoe or casing of pneumatic tires, which comprises laying cords of threads over a core or mandril, and locating a friction-fabric strip in retained position at a point under the length of cord and immediately beyond the side edges thereof, the cord being placed in its lay in contact with said friction-fabric strip and retained thereby in laid position with its side edges extending in free position beyond said strip, and the cords being laid so that each succeeding strand overlies the pref-,ed ing strand and said strai'ids relatively diverge in a continuous gradual and radial spread from the bead edge to the tread portion and entirely cover the increasing progressive variable circumference of the tire between the bead and tread with one lay or ply of the cords, and then folding the end portions of theA cords or threads beyond said friction-fabric strip into a loop and laying said looped ends at an angle to the portion which is secured to said strip.

9. rlhe method of constructing the internal body fabric Ifor the shoe or casing of pneumatic tires, which comprises laying a layer or ply of cords or threads over a core or mandril diagonally or at an angle to the transverse plane of the tire, and locatingr a friction-fabric strip in retained position at apoint under the length of cord and immediately beyond the side edges thereof, the cord being placed in its lay in Contact with said friction-fabric strip and retained therevby in laid position with its side edges ei;-

tending in :tree position beyond said strip,

turning the ends of the cords or threads beyond said friction-fabric strip at an angle ica - threads in a diagonal or oblique position reverse to that of said underlying layer, and turning the ends ot' the cords or threads at the bead-edge of said superposed layer 'at an angle to the strands thereof.

10. The method ot' constructing the internal body fabric for the shoe or casing of pneumatic tires, which consists in laying a layer or ply ot' cords or threads over a core or mandril diagonally or at an angle to the transverse plane of the tire` and locatinga friction-fabric strip in retained position unf der the length of cord and immediately beyond the edge thereof at the bead-edge portion, the cord being placed in its lay in con tact with said friction-fabric*strip and retained thereby in laid position with the bead-edge portion initially extending in free position beyond said strip, and said friction-fabric strip having a free portion ex tending beyond its point of contact with the cord. then turning the bead-edge portion of the length ot cord beyond saidfrictionfabric strip at an angle to the portion which is secured to said strip, laying a superposed layer or ply ot cords or threads in a diagonal or oblique position reverse-to that of said underlying layer, turning the side edges of the cord at the bead-edge ofsaid superl posed layer at an angle to the strands thereof`- and then turning the' free portion of said friction-fabric strip around the beadedge portion which comprises said turne edges of the superposed layers:

11. The method of constructing the internalbody fabric for the shoe or 'casing of pneumatic tires. which consists in laying a` length of cord or thread over a core or mandril, and locating a friction-fabric strip in retained position under the length ot cord and immediately beyond the edge thereof at thebead-edge portion. the-cord being placed in its lay in contact with said friction-fabric strip and retained therebyinvlaid position with the bead-edge portion initially extending in free position beyond said strip, and then turning the bead-edge portion ot the length of cord beyond said Jfrietion-fabric strip around a reinforcing ring or hoop and at an angle to the portion which is secured to said strip.

12. The method of constructing the internal body fabric for the shoe or casing of pneumatic tires, which comprises laying cords or threads over a core or inandril` and locating a friction-fabric strip in retained position at a point under the cords and immediately beyond the side edges thereof` the cords being placed in their lay in contact with said friction-fabric strip and retained thereby in laid position with the side edges extending in free position beyond said strip, and then folding the end portions of the cords or threads beyond said friction-tabric strip around a reinforcing ring or hoop and into a loop and laying said looped ends at an angle tothe portion which is secured to said strip.

13, Thevmethod of constructing the intere nal body fabric for the shoe or casing ot pneumatic tires, which comprises laying cords or threads under tension over a core or mandril with the bead-edge portion in contact with a friction-fabric strip7 and then moving the portion of the cords which is anchored to said friction-fabric strip in a plane which will stretch or lengthen the cords and increase and equalize the initial condition of tension. l y

14. The method of constructing the internal body fabric for the shoe or casing of pneumatic tires` which consists in laying cords or threads under tension over a core or mandril with the bead-edge portion. in contact with a friction-fabric strip, said strip having a free portion extending beyond its contact iirith the cord, then moving the portion of the cords which is anchored to said friction-fabric strip in a plane which will stretch or lengthen the cords and increase and equalize the initial condition o1 tension, and then turning the tree portion or" said frictionabric' strip around the bead-edge portion and in contact therewith to maintain said increased tensional status. l 15. The method et constrnc-tingr the inter- ,nal body fabric tor the shoe or casing of pneumatic tires, which consists in laying cords or threads over a core or mandril under an initial condition of tension and securingr said initial tension by bringing the bead-edge porton ot the cords or threads in contact with a friction-fabric strip which is in secured position with relation to the core or mandriland then moving the portion ot the cords which is anchored to said friction-fabric strip in a plane whit.,` will stretch or lengthen the cords and increase and equalize the initial condition of tension.

16. The method ot constructing the inter-` nal body t'abri'c for theshoe or casing of pneumatic tires,v which consists in laying cords or threads 'over a core or mandril un der an initial condition of tension and securing said initial tension by bringing the nal body fabric for the shoe o1' casing of pneumatic tires. which consists in laying cords or threads over a core or mandril in secured position, and then folding the end portions of the. cords or threads at the beadedge into a loop and laying said looped ends at an angle to the Inain strands.

18. The method ot' constructing the internal bod fabri(l for the shoe or casing of pneumatic tires. which consists in laying Cords or threads over a core or mandrl and in secured position so that they relatively ldiv'rge in a continuons gradual and radial Spread from the bead-edge to the tread portion and extend' diagonally or at, an angle to the transverse plane of the tire, and then folding' the end portions ol' the Cords or threads at the bead-edge into a loop and laying' said looped ends in Contact and in overlyingy position and in Contact with the underlying' strands and in a diagonal or oblique position at an angle to the lay of the marin portion of the length of cord.

ln testim 11y-whereof We have signed the foregoingspecification.

FREDRIGK S. DICKINSON. JOHN SPRINGER. 

